摘要： 1.Decompose Conditional（分解条件式）2.Consolidate Conditional Expression（合并条件式）3.Consolidate Duplicate Conditional Fragments（合并重复的条件片段）4.Remove Control Flag（移除控制标记）5.Replace Nested Conditional with Guard Clauses（以卫语句取代嵌套条件式）6.Replace Conditional with Polymorphism（以多态取代条件式）7.Introduce Null Object（引入Null 对象 阅读全文